Apple Stops Signing iOS 18.0.1, Blocks Downgrades from iOS 18.1
Apple has stopped signing iOS 18.0.1, meaning users can no longer downgrade from iOS 18.1. iOS 18.0.1 included bug fixes and performance improvements, while iOS 18.1 added the first set of Apple Intelligence tools and fixed several security exploits. Downgrading to older iOS builds is often used for jailbreaking iPhones and iPads, but there are currently no signs of any jailbreak tools for iOS 16 being developed. Users running iOS 17 can still receive security patches without upgrading to iOS 18.